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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RB3036-2WD0 |
| Alternative Part Number | 3RB30362WD0 |
| Manufacturer | Siemens |
| Product Type | Solid-state overload relay |
| Size | S2 |
| Trip Class | CLASS 20E |
| Operating Voltage (Rated Value) | 690 V |
| Operating Frequency (Rated Value) | 50...60 Hz |
| Adjustable Current Range | 20...80 A |
| Operating Current (Rated Value) | 80 A |
| Operating Power | 11...37 kW at 400 V, 50 Hz (3-phase motors); 15...55 kW at 500 V, 50 Hz; 18.5...75 kW at 690 V |
| Insulation Voltage | 690 V with degree of pollution 3 |
| Surge Voltage Resistance | 6 kV |
| Thermal Current | 60 A |
| Recovery Time | Typical 3 min after overload trip with automatic reset |
| Mounting Type | Contactor mounting |
| Dimensions (H x W x D) | 99 mm x 55 mm x 104 mm |
| Auxiliary Contacts | 1 NC (for contactor disconnection), 1 NO (for message "tripped") |
| Operating Current of Auxiliary Contacts (AC-15) | 4 A at 24/110/120/125 V; 3 A at 230 V |
| Operating Current of Auxiliary Contacts (DC-13) | 2 A at 24 V; 0.55 A at 60 V; 0.3 A at 110/125 V; 0.11 A at 220 V |
| Protection Class | IP20 on the front, IP00 of the terminal |
| Ambient Operating Temperature | -25...+60 °C |
| Installation Altitude | Maximum 2,000 m above sea level |
| Relative Humidity During Operation | 10...95 % |
| Electromagnetic Compatibility | Various EMC standards met, including IEC 61000-4-2, IEC 61000-4-4, IEC 61000-4-5, etc. |
| Short-Circuit Protection | Fuse link required for main circuit protection |
| Connection Type | Screw-type terminals for main circuit, spring-loaded terminals for auxiliary/control circuit |
The Siemens 3RB3036-2WD0 is a state-of-the-art electronic overload relay designed for motor protection. This component is part of the SIRIUS product line and is notable for its compact size S2, making it suitable for integration with contactors of the same size. It offers a broad adjustable current range of 20 to 80 A, ensuring versatility across various motor sizes and applications.
Crafted for efficiency, the 3RB3036-2WD0 features a power loss of only 4.6 W at rated current, contributing to a lower thermal footprint within control cabinets. The relay is equipped with screw-type terminals for the main circuit and spring-loaded terminals for the auxiliary circuit, facilitating a secure and maintenance-friendly connection.
With an insulation voltage rated at 690 V and a surge voltage resistance of 6 kV, the relay is robust against electrical disturbances. It also boasts an IP20 protection class on the front, providing a degree of protection against solid objects.
The 3RB3036-2WD0 is designed with an integrated auxiliary switch, one normally closed (NC) contact for contactor disconnection, and one normally open (NO) contact to signal when the relay is tripped. The operational current of the auxiliary contacts can handle up to 4 A at AC-15 and up to 2 A at DC-13, ensuring reliable performance in control circuits.
This overload relay is engineered with an electronic overload release, classified as CLASS 20E, which provides precise protection for motors by ensuring accurate tripping in the event of an overload. The device is also compliant with ATEX directive 2014/34/EU for use in potentially explosive atmospheres, highlighting its suitability for a wide range of industrial environments.
The 3RB3036-2WD0 is designed for flexibility in installation, with the ability to be mounted in any position and directly onto a contactor. Its dimensions are 99 mm in height, 55 mm in width, and 104 mm in depth, making it a compact solution for motor protection in space-constrained applications.
Overall, the Siemens 3RB3036-2WD0 overload relay is a reliable and efficient choice for safeguarding motors in industrial settings, offering both protection and ease of use in a compact form factor.
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Frequently Asked Questions
What is the function of this overload relay?
The overload relay is designed for motor protection and helps to prevent damage to electric motors caused by overloads. It operates by measuring the current flowing to the motor and tripping to cut off power if the current exceeds a pre-set limit.
Can this overload relay be mounted directly onto a contactor?
Yes, this overload relay is designed for contactor mounting, allowing for a compact and efficient setup within motor control systems.
What is the adjustable current range for this overload relay?
The adjustable current range for the overload relay is between 20 to 80 A, allowing it to be configured for the protection of motors with various current ratings.
What type of terminals does this overload relay have for the main and auxiliary circuits?
The overload relay features screw-type terminals for the main current circuit and spring-loaded terminals for the auxiliary and control current circuit.
What is the trip class of this overload relay?
The trip class of the overload relay is CLASS 20E, which defines its tripping characteristics and response time under overload conditions.
What are the dimensions of this overload relay?
The dimensions of the overload relay are 99 mm in height, 55 mm in width, and 104 mm in depth.
Is there a manual reset function available on this overload relay?
Yes, the overload relay comes with a manual reset function, as well as options for automatic and remote reset.
What is the insulation voltage rating for this overload relay?
The insulation voltage rating for the overload relay is 690 V with a degree of pollution 3, ensuring it can safely isolate electrical components within its rated voltage.
What is the operating temperature range for this overload relay?
The operating temperature range for the overload relay is from -25 to +60 °C, making it suitable for a variety of industrial environments.
Does this overload relay have any certifications for use in hazardous locations?
Yes, the overload relay has certifications for use in hazardous locations, ensuring it meets the necessary safety standards for such environments.
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